{
  "manageEntity": {
    "action": "Save",
    "entityId": "415983",
    "entityType": "Track",
    "nonce": "0x7a0a52360d823e877e22523c41c6b9ec2baeb5c87db9fa0a1f2afa3cffbd955a",
    "signature": "0x04d2235930528d0d6c0cc00687fa7e07154fbb545898b9c071f689f373dc27883945a0e97a04cab7d7beda60174609dcc6b436e423eb94ffc3eb7a4060ea0cc01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}